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21-03-2024
Physics

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A thin concavo-convex lens has two surfaces of radii of curvature R and 2R. The material of the lens has a refractive index μ. When kept in air, the focal length of the lens
A. Will depend on the direction from which light is incident on it
B. Will be the same, irrespective of the direction from which light is incident on it
C. Will be equal to Rμ−1
D. Will be equal to 2Rμ−1

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